Output Audio from EZ-B

This is an example with source code about how to play audio out of the EZ-B. The EZ-B will output audio as a stream or byte array.

Source code as a plugin project is here:
OutputAudioFromEZ-BSource.zip

*Dependency: Additional to adding ARC.exe and EZ-B.DLL, this plugin requires NAudio.DLL library to be added as a project reference. Remember to UNSELECT "Copy Files"! The naudio, arc.exe, ezb.dll are located in the c:\program files (x86) Synthiam arc installation folder. 

This plugin provides the following examples:

1) Load audio from MP3 or WAV file

Code:


// MP3
NAudio.Wave.Mp3FileReader mp3 = new NAudio.Wave.Mp3FileReader(openFileDialog1.FileName);

// WAV
NAudio.Wave.WaveStream wav = new NAudio.Wave.WaveFileReader(openFileDialog1.FileName);


2) Convert audio file to uncompressed PCM data to supported EZ-B sample rate and sample size

Code:


NAudio.Wave.WaveFormatConversionStream pcm = new NAudio.Wave.WaveFormatConversionStream(new NAudio.Wave.WaveFormat(EZ_B.EZBv4Sound.AUDIO_SAMPLE_BITRATE, 8, 1), mp3);


3) Compress PCM data with gzip to be stored in project STORAGE

Code:


                using (MemoryStream ms = new MemoryStream()) {

                  using (GZipStream gz = new GZipStream(ms, CompressionMode.Compress))
                    pcm.CopyTo(gz);

                  _cf.STORAGE[ConfigTitles.COMPRESSED_AUDIO_DATA] = ms.ToArray();
                }


4) Play audio data from compressed project STORAGE

Code:


        using (MemoryStream ms = new MemoryStream(compressedAudioData))
        using (GZipStream gz = new GZipStream(ms, CompressionMode.Decompress))
          EZBManager.EZBs[0].SoundV4.PlayData(gz);


5) Supports ControlCommand() for Play and Stop of audio to be used in external scripts

Code:


    public override object[] GetSupportedControlCommands() {

      List items = new List();

      items.Add(ControlCommands.StartPlayingAudio);
      items.Add(ControlCommands.StopPlayingAudio);

      return items.ToArray();
    }

    public override void SendCommand(string windowCommand, params string[] values) {

      if (windowCommand.Equals(ControlCommands.StartPlayingAudio, StringComparison.InvariantCultureIgnoreCase))
        playStoredAudio();
      else if (windowCommand.Equals(ControlCommands.StopPlayingAudio, StringComparison.InvariantCultureIgnoreCase))
        stopPlaying();
      else
        base.SendCommand(windowCommand, values);
    }


6) Changes the status of the button when audio is playing globally from anywhere in ARC on EZ-B #0

Code:


    public FormMain() {

      InitializeComponent();

      EZBManager.EZBs[0].SoundV4.OnStartPlaying += SoundV4_OnStartPlaying;
      EZBManager.EZBs[0].SoundV4.OnStopPlaying += SoundV4_OnStopPlaying;
    }

    private void FormMain_FormClosing(object sender, FormClosingEventArgs e) {

      EZBManager.EZBs[0].SoundV4.OnStartPlaying -= SoundV4_OnStartPlaying;
      EZBManager.EZBs[0].SoundV4.OnStopPlaying -= SoundV4_OnStopPlaying;
    }

    private void SoundV4_OnStopPlaying() {

      Invokers.SetText(btnPlayAudio, "Play");
    }

    private void SoundV4_OnStartPlaying() {

      Invokers.SetText(btnPlayAudio, "Stop");
    }



Output Text to Speech
You can output text to speech easily as well, using the following code example...

Code:


      using (MemoryStream s = EZBManager.EZBs[0].SpeechSynth.SayToStream("I am speaking out of the EZ-B"))
        EZBManager.EZBs[0].SoundV4.PlayData(s);